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<br />APPENDIX A <br />DESIGN CALCULATIONS <br />Structural Number Verification <br />(AASHTO Design of Pavement Structure - 1986) <br />• <br />Traffic: Design IS kip ESAL: 6,500 <br />Reliability: 50 percent <br />Overall Deviation: 0.40 <br />Soils: Resilient Modulus 5000 psi <br />PSI Loss Due To Traffic: 2.0 <br />Requred Structural Number = 1.36 <br />Required Gravel Sectiou <br />• <br />Minimum Structural Number(MSN) required = 1.36 <br />Gravel Section Required, using 6 inches of existing base course gravels = > <br />(1.36-6(0.14))/0.14 = 3.7 => <br />Use 4 inches of road base gravels. <br />r~Ra-~ <br />